Which of the following type of tongue thrusting has the worst prognosis?

Tongue thrusting has been variously described as a deviate swallow, visceral swallow, retained infantile swallow or reverse swallow. Prognosis Simple tongue thrusting - Excellent Complex tongue thrusting - Good Retained infantile swallow - Poor Pediatric Dentistry, Principles and Practice / M.S. Muthu, N. Sivakumar - 2nd Ed